Вход

вход по аккаунту

Патент USA US3039346

код для вставки на сайт или в блог

Ширина: (aвто)

Высота:

ссылки на документ

адрес страницы документа

адрес полноэкранного варианта

короткий адрес

June 19, 1962
R. J. KOBIELLA
3,039,336
CRIMPING TOOL HAVING A FULL STROKE COMPELLING MEANS
Filed Feb. 24. 1959
2 Sheets-Sheet 1
WW
June 19, 1962
R. J. KOBIELLA
3,039,336
CRIMPING TOOL HAVING A FULL STROKE COMPELLING MEANS
Filed Feb. 24. 1959
2 Sheets-Sheet 2
INVENTOR.
150561‘? J15051611”,
A TTOR/VE Y5
United States Patent 0
,.
IC€
3,939,336
Patented June 19, 1962
1
2
3,039,336
between which are mounted the crimping jaw links 12
and 13, which carry the crimping jaws 12’ and 13', these
CRlMPlNG TOOL HAVING A FULL STROKE
COMPELLING MEANS
Robert J. Kohiella, Rolling Meadows, 11]., assignor to
Signode Steel Strapping Company, Chicago, Ill., a cor
poration of Delaware
Filed Feb. 24, 1959, Ser. No. 794,984
12 Claims. (Cl. 81—-9.1)
The present invention relates to crimping tools in which
the crimping jaws are mounted between a pair of side
plates with manual operating handles connected to the
jaws for manipulation thereof. More particularly, the
invention relates to new and improved structures for
insuring that the crimping jaws are moved into their fully
closed, crimping position before the operating handles
crimping jaw links being mounted for movement between
the side plates 10 and 11 in a plane parallel to the plane
of the side plates. The term crimping jaw is also em
ployed to designate the combination of crimping jaw link
and crimping jaw per se.
Secured to the side plate 11 is a ?xed handle mount
14 having a bore 15 within which the ?xed handle 16 is
secured. The ?xed handle mount 14 is desirably formed
integral with the side plate 11 as a single casting. The
side plate 10 is secured to the side plate 11 and also to
the handle mount 14 by means of bolts 17, 18 and 19.
Bolt 17 is threaded into the mounting plate 14, as indi
15 cated at 17’, and bolts 18 and 19 are fastened in place
can be oppositely moved to open the jaws and thereby
release the crimping tool from the work.
Crimping tools of the type under consideration are
well known for the crimping of overlapped strap ends,
which may be surrounded by a seal, for the purpose of
sealing the strap ends together.
by means of nuts such as the nut 18’ shown in FIG. 1.
The invention requires at least one movable handle 20
mounted for pivotal movement. In the embodiment of
the invention shown in the drawings, the movable handle
20 moves in a plane perpendicular to the plane of the
side plates. A reciprocating member is linked to the
movable handle for movement thereby and means link
A di?iculty which has been experienced often in the
the reciprocating member with the crimping jaws whereby
use of this type of tool lies in the fact that a proper seal
a forward or closing movement of the movable handle
for strap ends requires that the operator of the tool 25 will lower the reciprocating member and close the jaws
should manipulate the handles and the jaws of the tool
and an opposite or opening movement of the movable
through a full crimping stroke. If the operator removes
handle will elevate the reciprocating member and open
the tool from the strap ends after only partially complet
the jaws.
ing the crimping stroke, a proper seal will not be effected
The ?xed handle 16 provides leverage for operating
and the strap ends may separate and release the goods
the movable handle 20 and may be eliminated when the
tied or bound by the strap.
crimping tool is ?xed in position as part of a sealing tool
A full jaw-closing, crimping stroke is insured in accord
in which event the tool body provides the desired leverage.
ance with the present invention, so that the operator of
The ?xed handle mount 14 is formed at its upper end
an embodiment of this invention cannot effect only partial
with a pair of forwardly extending ears 14' which extend
35 to a positoin above the side plate 10. The movable op
crimping of a seal.
An illustrative embodiment of this invention as de
erating handle 20 is pivoted to the cars 14' of the ?xed
scribed in detail below, includes a combination of a
handle mount 14 by means of pin 21 which is secured
toggle-biased latch, a movable operating handle that
in place by lock washer 21'. The movable operating
operates a reciprocating member which coacts with the
latch to move the same into a position where the toggle 40
biases the latch into a handle-obstructing position to,
obstruct opposite or jaw-opening movement of the operat
ing handle, and means associated with the movable operat~
ing handle and coacting with the latch to move the same
into a position where the toggle biases the latch into a 45
handle 20 carries a link 22 which is pivotally secured at
one end to a downward extension 23 of the operating
handle 20 and to a reciprocating member 24 at the other
end thereof. The movable operating handle 20 is formed
handle-releasing position.
formed as a yoke to provide a pair of downwardly ex
.
The invention will be more fully described in con
with a cam face 20’ on the inner side thereof, the purpose
of which will be described hereinafter.
The lower end of the reciprocating member 24 is
tending legs 25 and 26 through which a pin 27 projects.
junction with the accompanying drawings showing an
Reciprocating member 24 may also be termed a cross
illustrative embodiment of the invention and in which:
FIG. 1 is a partial side elevation, partly in section, and
illustrating a preferered crimping tool constructed in ac
head.
cordance with the invention, the tool being shown with
the operating handles in closed position;
FIG. 2 is an end View of the crimping tool shown in
The pin 27 carries the crimping jaw operating
links 28 and 29 which are pivoted at their outer ex
tremities to the crimping jaw links 12 and 13 by the
pivotal connections 3%) and 31 respectively. The crimp
ing jaws 12 and 13 are pivoted to the side plates 10 and
11 by the pins 32 and 33.
'
FIG. 1;
When the reciprocating member 24 is elevated, the
FIGS. 3, 4 and 5 are diagrammatic partial side eleva
inner end of the links 28 and 29 are elevated drawing the
tions showing the operation of the crimping tool of the
pivots 3t? and 31 inwardly to cause the crimping jaw links
invention in step-by-step fashion;
‘12 and 13 to be pivoted around'pivots 32 and 33 and
FIG. 3 shows the handles in closed position, this posi-i
cause the crimping jaws 12’ and 13' to be pulled out
tion corresponding to the fully closed, crimping position 60 wardly into work-releasing position.
of the crimping jaws;
Thus, a reciprocating member constituted by crosshead
FIG. 4 shows the operating handles in open position,
24 is linked by means of link 22 to the movable handle
corresponding to the open or work-releasing position of
20 for movement thereby and means are provided for
the crimping jaws; and
linking the reciprocating member with the crimping jaws
FIG. 5 shows the operating handles in partially closed
whereby forward or closing movement of handle 20
position, corresponding to a position of the crimping
toward handle 16 will lower the reciprocating member
jaws in which the work is partly deformed and in which
and close the crimping jaws, and opposite or opening
position the crimping jaws encircle the work and cannot
movement of handle 20 away from handle 16 will elevate
be pulled away therefrom.
the reciprocating member and open the crimping jaws.
Referring more particularly to FIG. 1, the crimping 70 Referring again to FIG. 1, the ?xed mounting plate
tool illustrated comprises apair of side plates 10 and 11
14 is. formed with ?anges or webs 34 which extend up
3,039,386
3
4
wardly and forwardly of the ?xed handle 16. Extending
set forth, the invention will be more fully understood
across webs 34 at the lower rearward end thereof is a
shoulder portion 35 which is formed with a recess 35
from the description of the operation which is presented
in conjunction with the step-by-step diagrammatic draw
ings of FIGS. 3, 4 and 5.
formed with an enlarged mouth in which a spring back
ing washer 37 is seated.
The mechanism is shown in FIG. 3 in a fully closed
‘One end of a toggle bolt 38
position. In FIG. 4 the mechanism is fully open and
in FIG. 5 the mechanism is partly closed and is shown
toggle bolt 38 is surrounded by a compression spring
as moving in a jaw closing direction.
39 which is seated at one end on the washer 37 and
Starting with the mechanism in a fully closed position,
at the other end against an outwardly extending ?ange
10 arrow A identi?es the direction of opposite or opening
40 ‘formed on the toggle bolt 38.
,
pivotal movement of the operating handle 20 which func
A latch plate 42 is pivotally secured to the interior
tions to open the crimping jaws \12’ and 13'. This oppo
of the webs 34 of the ?xed mounting plate 14 and is
site or opening movement of handle 20 elevates the link
mounted for rotation about a central support or pivot
22 which raises the crosshead or reciprocating member
pin 41 which is ?xed with respect to side plates 19 and
11. The rear end of the latch plate 42 is formed with 15 24 and the pivot pin 27 (arrow B). As the crosshead
extends through the washer 37 into the bore 36.
The
or reciprocating member 24 moves upwardly from the
a tail 43 which is pivotally secured to the forward end
of toggle bolt 38 by means of pin 44. It will be ob
served that pin 44 as shown in FIG. 1 is positioned above
and to the right of an imaginary line between the pivot
41 and the bore 36. The intermediate dead center posi- .
tion is on this line. Spring 39 serves to ‘bias tail 43
of latch plate 42 selectively on either side of the inter
mediate dead center position. In FIG. 1 the parts are
shown in what will be seen hereafter to be handle re
position shown in FIG. 3 to the position shown in FIG. 4,
the cam face 45 forming on the reciprocating member 24
engages the follower 46 on the latch plate 42 and causes
be
the
the
the
compression toggle spring 39 acts upon the ?ange 40 of
leasing or retracted position in which the latch plate 42 25 toggle bolt 38 to force the latch plate 42 to rotate still
further in a clockwise direction thereby forcing the lower
is held in a counterclockwise rotated position.
portion of latch plate 42 against the protruding end 27’
The reciprocating member or crosshead 24 is formed
of pin 27. The movement of the latch plate 42 is in
with a cam face 45 that coacts with the upper inner end
dicated by arrow C in FIG. 4.
of the latch plate 42 which in FIGS. 1 and 3 is posi
When the crimping tool is in the position shown in
tioned in the path of the reciprocating member 24. The 30
FIG. 4 with the handle 20 in its fully elevated position
cam face 45 coacts with a roller or cam follower 46 ro
and the crimping jaws opened, the tool may be positioned
tatably mounted in the upper inner end of the latch
with the crimping jaws disposed about the overlapped
plate 42 as'indicated at 47. The protruding end 27’ and
strap ends and seal member to be crimped together so
the upper inner end of the latch plate 42 carrying fol
lower 46 extend through a slot 11' in side wall 11.
the latch plate 42 to pivot in a clockwise direction
yond dead center (pin 44 is moved below and to
left of an imaginary line between the pin 41 and
bore 36). As soon as pin 44 passes dead center,
35 that the movable handle 20 may be moved forwardly or
When the crosshead 24 is elevated by raising the mov
able handle 20, the cam face 45 will bear against the
downwardly to cause the crimping jaws to close there
about and thereby effect the desired crimping and sealing
42 biases the lower portion of the latch plate toward
reciprocating member 24 while the crimping jaws are
protruding end 27’ of pin 27 moves beneath the locking
corner 48 of the latch plate 42, thus freeing the latch
plate 42 for further clockwise rotation as indicated by
arrow F. This further rotation is effected by the ‘ac
operation.
follower 46 to cause the upper inner end of the latch
FIG. 5 shows the handle 2%) in its partially closed
plate 42 to move away from the reciprocating member.
This rotates the latch plate in a clockwise direction until 40 position, the partial closing movement being indicated
by the arrow D. During the closing or forward move
the tail 43 is moved to position the pin 44 below dead
ment of handle 20, the link 22 is lowered thereby also
center as the reciprocating member 24 nears its fully
lowering the crosshead or reciprocating member 24 and
elevated position. When pin 44 moves beyond dead
the pivot pin 27 (note arrow B). As the pivot pin 27
center, spring 33 forces the latch plate 42 to rotate in
a clockwise direction. The initial rotation of latch plate 45 is lowered, the crimping jaws close about the work and
partly open.
The locking corner 4d on the lower inner
end of the latch plate 42 abuts the end face of protrud
ing portion 27' of the pivot pin 27 in reciprocating mem
ber 24 preventing the latch plate 42 from moving fur
50
tion of the toggle compression spring 39 which, together
with toggle bolt 38 freely mounted in bore 36 provides
a constant biasing force tending to rotate latch plate
42 away fro-m its dead center position. It will be ob
served that the locking corner 48 of the latch plate 42
fully open position. When the handle is lowered and
the crimping jaws are moved in a closing direction, the 55 has now been moved into a position overlying the lock
ther into a blocking position and permitting the handle
20 and crimping jaws l2 and 13 to be moved to a
protruding portion 27' of pin 27 will pass below lock
ing corner 48 permitting the latch to be biased by com
ing pin 27 and more particularly into the path of the
protruding portion 27’ of the locking pin 27. The
handle 20 cannot be elevated‘ or moved in an opposite
pression spring 39 to a position over the portion, 27’
of pin 27 so that a blocking action is thereby achieved.
direction to cause the crimping jaws to release the work
The invention also includes means associated with the 60 because an opening or opposite movement of handle
20 must be accompanied by an elevation of reciprocat
movable handle and positioned in the path of the upper
endgof the latch plate when the latch plate is in blocking
ing member 24 and locking pin 27 and such elevation
position for returning the latch plate to a position beyond
is prevented because of the blocking action provided
dead center in the opposite direction as the movable
handle reachesthe end of its opposite movement corre
by the locking corner 48 of the latch plate 42 acting
sponding to'a fullyyclosed position of the crimping jaws.
against the top of protruding portion 27’ of pin 27.
When the handle 20 is moved forwardly to its fully
The structure for returning the latch plate in this em
closed position to complete the crimping stroke,’ as shown
in PEG. 3, the cam face 2t)’ on the movable handle 25)
bodiment of the invention is constituted by the cam face
20' formed on the underside of the head of the movable
contacts the follower 46 and moves the roller 46 down
handle 20. As the handle is moved to a closed position 70 wardly as the follower 46 rolls along the cam face 20'
the cam face 20' contacts follower 4s carried by the latch
thereby pivoting the latch plate 42 in a counter-clock~
plate 42 and moves the same in retracted direction, coun
wise direction to a position beyond dead center. The
ter clockwis as viewed in FIG. 1 until it passes the dead
spring 39 coacts with the ?ange 40 of the toggle bolt
center position.
~
38 to rotate the latch plate 42 in a counter-clockwise
While the structure of the crimping tool has now been 75 direction into ‘a retracted position in which the locking
3,039,336
5
6
corner 48 of the latch plate 42 is clear of the protrud
ing end 27’ of the pivot pin 27. In this manner, the
handle 20 is freed for jaw opening or releasing move
ment. Accordingly, when the crimping stroke has been
completed the handle 20 is free for opening movement
as indicated in FIG. 4 whereby the crimping jaws may
be opened and the work released.
Thus, when a crimping tool embodying the present
invention is employed to crimp overlapped strap ends
?xed end of said biasing means, the upper inner end of
said latch plate being positioned in alignment with the
path of said reciprocating member such that elevation of
said reciprocating member will move the lower inner end
of said latch plate toward said reciprocating member
to a position away from said dead center line when
said reciprocating member nears its fully elevated posi
tion and whereby said biasing means will rotate said
latch plate and bias the lower portion of said latch plate
to seal the same, the tool cannot be released from the 10 toward said reciprocating member when said crimping
work until the crimping operation has been completed.
Prior to completion of the crimping operation the jaws
are interengaged with the work, due to partial crimping
thereof, and they cannot be opened due to engagement
jaws are partly open, said reciprocating member having
a protruding portion which is contacted by the lower
inner portion of said latch plate when said latch plate
is initially rotated to prevent re-opening of the tool
of the latch plate 42 and the pin 27.
15 during initial closure of the jaws.
'
It will be understood that the speci?c structure which
2. A crimping tool comprising a pair of side plates, a
has been illustrated annd described constitutes a preferred,
movable handle mounted for pivotal movement with re
illustrative construction in accordance with the inven
spect to said side plates, a pair of crimping jaws positioned
tion and that many variations in speci?c structure can
between said side plates and movable in a plane parallel
be made without departing from the present invention.
to said side plates between an open work-receiving posi
Thus, as an example, the protruding end 27’ of pivot
tion and a closed crimping position, a reciprocating mem
pin 27 is not essential and this structure can be replaced
ber linked to said movable ‘handle for movement thereby,
by a suitable projecting portion formed on the recip
means linking said reciprocating member with said crimp~
rocating member 24 and reference to a protruding por
ing jaws whereby forward movement of said movable
tion on the reciprocating member is intended to include 25 handle will lower said reciprocating member and close
the protruding end 27’ of pivot pin 27. Further, the
said jaws, and opposite movement of said movable handle
cam face 45 may be replaced by other means associated
will elevate said reciprocating member and open said
with the reciprocating member 24 or the link 22 or even
jaws, a latch plate mounted at a pivot point for pivotal
the pivot pin 27 to engage the upper extremity of the
movement with respect to said side plates, and rotational
latch plate 42 in order to pivot the same in a clock 30 biasing means‘ associated with said latch plate at one end
wise direction during the upward movement of the re
and substantially ?xed at its other end, the line between
the pivot point of the latch plate and said substantially
ciprocating member 24. Still further, the roller 46 may
be eliminated and the handle 20 made to act directly
?xed end of said biasing means being an intermediate
upon the'latch plate 42 or a slide plate may be sub
dead center line, said rotational biasing means being dis
stituted for the roller 46. As will be evident also, the 35 posed to rotatably bias the lower outer end of said latch
cam face 20’ on the operating handle 29 may be elimi
plate away from said intermediate dead center line be
tween the pivot point of the latch plate and the substan
nated and any other suitable means employed for piv-V
tially ?xed end of said biasing means, the upper inner end
oting the latch plate 42 in a counter-clockwise direc
of said latch plate being positioned in alignment with the
tion when the handle 20 is moved forwardly into its
lowermost position. Similarly, while a toggle and com 40 path of said reciprocating member such that elevation of
said reciprocating member will move the lower inner end
pression spring combination seated within‘a bore in the
of said latch plate toward said reciprocating member to a
mounting plate 14 has been described as a preferred il
position away from said dead center line when said recip
lustration for constantly rotationally biasing the latch
rocating member nears its fully elevated position and
plate away from an intermediate dead cented position, it
will be appreciated that many other biasing structures 45 whereby said biasing means will rotate said latch plate
and bias the lower portion of said latch plate toward said
providing the same function may be used. For exam
reciprocating member when said crimping jaws are partly
ple, the latch plate may be formed with a wedge cam
open, said reciprocating member having a protruding por
surface and a spring-biased roller-follower may bear
tion which is contacted by the lower portion of said latch
against the cam surface to cause the latch plate to be
pivoted away from a dead center position in which the 50 plate when said latch plate is initially rotated, said'latch
plate being formed with a locking corner at the lower
roller contacts the apex of the cam.
inner end thereof so that‘when said protruding portion of
I claim:
said reciprocating member moves below said locking cor
1. A crimping tool comprising a pair of side plates,
ner while said crimping jaws are closing, said biasing
a movable handle mounted for pivotal movement with
means Will further rotate said latch plate to cause said
respect to said side plates, a pair of crimping jaws po
sitioned between said sid'eplates and movable in a plane
parallel to said side plates between an open work-rel
ceiving position and a closed crimping position, a re
ciprocating member linked to said movable handle for
movement thereby, means linking said reciprocating 60
locking corner to overlie said protruding portion and
block elevation of said reciprocating member to thereby
prevent an opposite movement of said movable handle
and prevent opening of the partially closed crimping jaws.
3. A crimping tool comprising a pair of side plates, a
movable handle mounted for pivotal movement with re
member with said crimping jaws whereby forward move
spect to said side plates, a pair of crimping jaws posi
ment of said movable handle will lower said recipro
tioned between ‘said side plates and movable in a plane
cating member and close said jaws, and opposite move
parallel to said side plates between an open work-receiv
ment of said movable handle will elevate said' recipro
cating member and open said jaws, a latch plate mounted 65 ing position and a closed crimping position, a reciprocat
ing member linked to said movable handle for movement
at a pivot point for pivotal movement with respect to
thereby, means linking said reciprocating member with
said side plates and rotational biasing means pivotally
said crimping jaws whereby forward movement of said
associated with said latch plate at one end and substan
movable handle‘ will lower said reciprocating member
tially ?xed at its other end, the line between the pivot
point of the latch plate and the substantially ?xed end 70 and close said jaws, and opposite movement of said mov
able handle will elevate said reciprocating member and
of said biasing means being an intermediate dead‘ cen
open said jaws, a latch plate mounted at a pivot point for
ter line, said rotational biasing means being disposed to
pivotal movement with respect to said side plates, rota
rotationally bias the lower outer end of said latch plate
away from said intermediate dead center line between
tional biasing means associated with said latch plate at
the pivot point of the latch plate and the substantially
one end and substantially ?xed at its other end, the line
3,039,336
7
between the pivot point of the latch plate and said sub
stantially ?xed end of said biasing means being an inter
mediate dead center line, said rotational biasing means
being disposed to rotatably bias the lower outer end of said
latch plate away from said intermediate dead center line
between the pivot point of the latch plate and the sub
stantially ?xed end of said biasing means, the upper inner
end of said latch plate being positioned in alignment with
53
other of said side plates and a web extending upwardly
and forwardly of said ?xed handle, said movable handle
being pivoted to said ears, said latch plate being mounted
on said web.
10. A crimping tool as recited in claim 9 in which said
web is formed with a shoulder portion de?ning a bore at
the lower rearward end thereof, and said rotational bias
ing means comprises a toggle bolt freely mounted in said
bore at one end thereof and pivoted to the lower end of
the path of said reciprocating member so that elevation
of said reciprocating member will move the lower inner 10 said latch plate at the other end thereof and a compres
sion spring seated adjacent said bore and biasing said bolt
end of said latch plate toward said reciprocating member
away from said shoulder whereby the point of intercon
to a position away from said dead center line when said
nection between said bolt and said latch plate is constantly
reciprocating member nears its fully elevated position and
biased to move in a direction away from a line joining
whereby said biasing means will rotate said latch plate
and bias the lower portion of said latch plate toward said 15 said bore with the point of securement of said latch plate
with said web.
reciprocating member when said crimping jaws are partly
11. The apparatus of claim 3 wherein said tool includes
open, said reciprocating member having a protruding por
a ?xed handle secured to one of said side plates, said side
tion which is contacted by the lower inner portion of said
plate further comprising an integral handle mount includ
latch plate when said latch plate is initially rotated, said
ing a web extending upwardly and forwardly of said ?xed
latch plate being formed with a locking corner at the lower
handle, said latch plate being mounted on said web, said
inner end thereof so that when said protruding portion of
web being formed with a shoulder portion at the lower
said reciprocating member moves below said locking cor
rearward end thereof, said shoulder having a bore therein
ner while said crimping jaws are closing, said biasing
means will further rotate said latch plate to cause said
disposed substantially in alignment with said latch, and
locking corner to overlie said protruding portion and
block elevation of said reciprocating member to thereby
prevent an opposite movement of said movable handle
and prevent opening of the partially closed crimping jaws,
said rotational means comprises a toggle bolt freely’
upper inner end of said latch plate to lower the same as‘
said movable handle is moved forwardly to closed
disposed on said shaft to form a supported resilient means
mounted in said bore at one end thereof and pivoted to
the lower end of said latch plate at the other end thereof
and a compression spring seated adjacent said bore and
biasing said bolt away from said shoulder whereby the
and means associated with said movable handle and posi
tioned in the path of the upper end of said latch plate 30 point of interconnection between said bolt and said latch
plate is constantly biased to move in a direction away
when said latch plate is in blocking position for returning
from a line joining said bore with the point of securement
said latch plate in the opposite direction as said movable
of said latch plate with said web.
handle reaches the end of its opposite movement corre
12. In a crimping tool having a ?xed handle, a mov
sponding to a fully closed position of said crimping jaws.
4. A crimping tool as recited in claim 3 in which said 35 abel handle, and mechanism disposed to perform a crimp
ing operation upon movement of said movable handle
means linking said reciprocating member with said crimp
with respect to said ?xed handle; means to provide full
ing jaws includes a pivot pin extending through said re
jaw-closing of said tool to prevent partial crimping of a
ciprocating member, the end of said pivot pin protruding
seal, said full jaw-closing means comprising a reciprocat
through said reciprocating member constituting the ‘pro
truding portion of said reciprocating member.
40 ing member responsive to movement of said movable
handle to provide jaw-closing and jaw-opening, a movable
5. A crimping tool as recited in claim 3 in which said
latch, said latch being cooperatively arranged with said
means for constantly rotationally biasing said latch plate
reciprocating member to obstruct movement of said recip
away from an intermediate dead center position com
rocating member in one position of said latch, and to be
prises a toggle bolt pivoted to the lower end of said latch
plate and a compression spring biasing said bolt toward 45 disengaged from said reciprocating member in another
position of said latch, and toggle means to bias said latch
said latch plate.
toward either said obstructing position or said disengag
6. A crimping tool as recited in claim 3 in which said
ing position, said toggle means comprising a toggle mem
latch plate carries a roller at the upper inner end thereof
ber having a flat vhead and a shaft portion, said ?at head
and said reciprocating member is formed with an inclined
being pivotally attached to said latch, said ?xed handle
cam face which engages said roller to rotate said latch
having means ?xedly secured thereto, said secured means
plate.
'
having a recess therein, said shaft of said toggle having
7. A crimping tool as recited in claim 3 in which said
an end thereof disposed in said recess, said recess diam
means for returning said latch plate in the opposite direc
eter being larger than the diameter of said shaft to enable
tion includes a cam face surface disposed on the under
side of said movable handle, said cam face engaging the 55 pivoting of said shaft in said recess, and a coiled spring
position.
8. A crimping tool as recited in claim 7 in which said
latch plate carries a roller at the upper inner end thereof,
said roller engaging said cam face on the underside of said
movable handle.
9. The apparatus of claim 3 wherein said tool includes
a ?xed handle secured to one of said side plates, said ?xed
handle being disposed in the plane of rotation’ of said
pivotally movable handle, and one side plate including a
mount comprising forwardly extending ears overlying the
to bias said latch, said toggle being aligned with said latch
for movement of said latch to said disengaging position
when said movable handle is moved to a fully closed
position.
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,831,380
Falck-Pedersen _______ __ Apr. 22, 1958
2,833,170
Pachter _____ .._' ________ __ May 6, 1958
2,855,813
Hepler _______________ .. Oct. 14, 1958